Metal-cutter



(N0 Model.)

@www @44 .D G w .MMQf/@AF 2.1 .W

l@ w w 7@ e .Awa p.. 4

1N VEA/,7012,

g77/W45 TocZaZ' BY l A T TOR/VE yS UNITED STATES PATENT EEICE.

HENRY B. TODD, OF MERIDEN, CONNECTICUT.

METAL-CUTTER.

SPECIFICATION forming part of Letters PatentrNo. 447,849, dated March10, 1891. Application tiled January 10, 1891. Serial No. 377,324. (Nomodel.)

To @ZZ r11/"1,0772, it may concern:

Be it known that I, HENRY B. TODD, of Meriden, in the county of NewI-laven and State of Connecticut, have invented certain new and usefulImprovements in Metal-Cutters, of which the following is a full, clear,and exact description, whereby any one skilled in the art can make anduse the same.

The object of my invention is to provide a machine by means of which apiece of metal, as a rod, ba'r, or strip of sheet metal of a thicknesstoo great to be cut by the ordinary cutters or pinchers in common use,may be readily and quickly out; and to this end my invention consists inthe combination of the devices by means of which this result may beaccomplished, and in details of the several parts of the machine, asmore particularly hereinafter described, and pointed out in the claims.

Referring to the drawings, Figure l is adetailperspective view of oneform of my metalcutting machine. Fig. 2 is a detail view in verticalsection on plane @c of Fig. 1. Fig. 3 is a detail view in side elevationof a machine combining two forms of cutting implements. l

In the accompanying drawings the letter ct denotes the frame of themachine, having a base b and an upright part c. This frame is preferablyof cast metal, made in one piece, and with a recess CZ on one edge ofthe upright part, the lower floor of the recess forming a cut or base,and the overhanging part of the frame having a vertical socket a', inwhich a cutting-tool c is supported. In case the machine is to be usedasa cutting-off tool the lower cutter c is secured in a socket formed inthe floor of the recess, and it may be held in this socket bymeans ofthe clampscrews f, that are located in threaded sockets in the body ofthe frame.

Directly opposite to the lower cutter, and with its cutting-edge in thesame horizontal plane, is arranged the Lipper cutter e, that is capableof longitudinal movement in its socket. 4

This cutter is fitted so as to `have proper freedom of movement withinthe socket, and is adjusted to the proper vertical plane, as by means ofa thin shim of metal slipped into the said socket, and the movement ofthe cutter may also be controlled by means of clamp-screws, the ends ofwhich project into the socket and against the side of the cutter or ashim that is located between the side of the cutter and the ends of thescrews. The frame of the machine is made sufciently strong to withstandthe shock of a comparatively heavy blow delivered upon the head of thecutting-tool c, as by means of a hammer or like implement, and to holdthe chisel or like cutting-tool against any sidewise movement under theshock of the blow. By means of this device an accurate adjustment of thetwo cutting-tools with respect to each other is insured, and the uppercutter is also held so that in cutting it enters the metal without anyrocking'movernent or sidewise play, such as follows when a cold-chiselor the like is held in the hands of a workman, and as a result' of thisimproved means an efficient and durable metal-cutting implement isprovided.

In the form shown in Fig. l the two cuttingedges are directly opposed toeach other; but the cutting implements may be provided with achisel-edge, so as to give a shearing cut, or a'punch may be used thatgives also a shearing cut, and in any event the mechanism iscomparatively cheap, simple, and strong in construction.

The frame or body d of the machine may be so constructed as to providefor a recess g on the side opposite to thatin which the cuttingoff toolworks,` and on this side a punch h is arranged in a vertical socket, thefemale die 7L being secured in a socket in the tloor of the recess inproper alignment with the reciprocating punch h. A lever t' is pivotallysupported on the frame of the machine, and is connected to the punch hby a pin passing through the punch and a slot c" made in the forked endof the lever. The outer end of the lever may be left free, or it may inlike manner be attached` to the chisel, the object of the lever being toprovide means for Withdrawing the punch from the work after a hole hasbeen made by driving the punch through the material, as with a hammer.

In the use of most cutting tools or chisels usable in this machine, astop device of some kind to prevent the contact of the opposingcutting-edges in use is desirable. One form of stop 7c is shown in Fig.1, and it consists of a shoulder formed near the cutting-edge or IOOpoint of the chisel, preferably on both tools, and a block, that may ormay not be integral with the chisel, arranged to come into Contact withthe opposite shoulder and keep the cutting-edges slightly apart. In thepreferred form the shoulders are made on both the opposing tools, andthe stop-block is a separate piece. A

I claim as my invention- I. In combination with a supporting-frame, acutting-tool held in a socket in the frame and a reci proeatingcutting-tool supported in a socket in alignment with the lower tool andhaving its outer end adapted and arranged to receive a blow from ahammer or like tool, all substantially as described.

2. In combinatioma tool-supporting frame, a Work-holding table or base,a reciprocating cutting-tool arranged in a socketin the frame andadapted to receive on its upper end a blow from a hammer or like tool,allsubstantially as described.

3. In combination, a tool-supporting frame, a Work-holding table orbase, a reciprocating cutting-tool arranged in a socket in the frame andadapted to receive on its upper end a blow from a hammer or like tool,and a stop device that limits the downward movement ot' thecutting-tool, all substantially as described.

4. In combination, a tool-supporting frame, a Work-holding table, ametal-Working tool supported in a socket in the table, and areciprocating cutting-tool supported in asocket in the frame in linewith the lower tool, all substantially as described.

5. In combination, a tool-supporting frame, a reciprocating punch Withits opposing die arranged on one side of the frame, a reciprocatingcutting-off tool arranged in a socket on the Opp Osite side of theframe7 and a punchwithdrawing lever pivotally supported on the frame,all substantially as described.

HENRY Il. TODD. IVitnesses:

A. L. O'rs, J No. B. HALL.

